Mid and Near-Infrared Reflection Spectral Database of Natural Organic Materials in the Cultural Heritage Field

Claudia Invernizzi; Tommaso Rovetta; Maurizio Licchelli; Marco Malagodi

doi:10.1155/2018/7823248

Mid and Near-Infrared Reflection Spectral Database of Natural Organic Materials in the Cultural Heritage Field

Int J Anal Chem. 2018 Oct 1:2018:7823248. doi: 10.1155/2018/7823248. eCollection 2018.

Authors

Claudia Invernizzi^{1

2}, Tommaso Rovetta^{1

3}, Maurizio Licchelli^{1

4}, Marco Malagodi^{1

5}

Affiliations

¹ Arvedi Laboratory of Non-Invasive Diagnostics, CISRiC, University of Pavia, Via Bell'Aspa 3, 26100 Cremona, Italy.
² Department of Mathematical, Physical and Computer Sciences, University of Parma, Parco Area delle Scienze, 7/A, 43124 Parma, Italy.
³ Department of Physics, University of Pavia, Via Bassi 6, 27100 Pavia, Italy.
⁴ Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy.
⁵ Department of Musicology and Cultural Heritage, University of Pavia, Corso Garibaldi 178, 26100 Cremona, Italy.

Abstract

This study presents mid and near-infrared (7500-375 cm^-1) total reflection mode spectra of several natural organic materials used in artworks as binding media, consolidants, adhesives, or protective coatings. A novel approach to describe and interpret reflectance bands as well as calculated absorbance after Kramers-Kronig transformation (KKT) is proposed. Transflection mode spectra have represented a valuable support both to study the distorted reflectance bands and to validate the applicability and usefulness of the KK correction. The aim of this paper is to make available to scientists and conservators a comprehensive infrared reflection spectral database, together with its detailed interpretation, as a tool for the noninvasive identification of proteins, lipids, polysaccharides, and resins by means of portable noncontact FTIR spectrometers.